Samkalpakalpadruma 17.4

17.4

āvirbhāvas tirobhāvo bhaven me'tra yuge yuge |
tejomayam idaṃ ramyam adṛśyaṃ carmacakṣuṣā ||258||1
tad etad vistarād brahmasaṃhitāyāṃ nirūpitam |
golokanāmnā2 tanmadhye gokulākhyaṃ hareḥ padam ||259||

My appearance and disappearance may occur here from age to age; / this charming place, full of light, cannot be seen with material eyes." / This is described in detail in the Brahma-saṃhitā / under the name of Goloka, within which is the abode of Hari called Gokula;